CN106734324B - The production and processing technology of motor spring ultra-wide thickness rate rectangular lines - Google Patents
The production and processing technology of motor spring ultra-wide thickness rate rectangular lines Download PDFInfo
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- CN106734324B CN106734324B CN201611238486.8A CN201611238486A CN106734324B CN 106734324 B CN106734324 B CN 106734324B CN 201611238486 A CN201611238486 A CN 201611238486A CN 106734324 B CN106734324 B CN 106734324B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
- B21C37/00—Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape
- B21C37/04—Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape of bars or wire
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B1/00—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations
- B21B1/16—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling wire rods, bars, merchant bars, rounds wire or material of like small cross-section
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D53/00—Making other particular articles
- B21D53/88—Making other particular articles other parts for vehicles, e.g. cowlings, mudguards
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- Mechanical Engineering (AREA)
- Metal Rolling (AREA)
Abstract
The present invention discloses a kind of production and processing technology of motor spring ultra-wide thickness rate rectangular lines, comprising the following steps: (1) drawing: round wire rod is drawn into rectangular wire rod；(2) it anneals: using isothermal recrystalization annealing process, (3) cold rolling: cold rolling being carried out using cold-rolling mill square shaped wire rod and forms rectangular wire, tension-rolling is used in cold rolling, cold-rolled process uses technical cooling and lubrication, and controls reduction ratio less than 60%.After processing, the wire thickness and width dimensions upper deviation is small, accuracy is high.Its edge is plane, and corner radius is smaller, high with components equipment compactness.Wire rod shape is excellent, i.e., straightness is preferable, and poker characteristic is good.Meet client's height deformation forming requirements.Rectangular lines surface smoothness is high, and defect is few, is suitable for the higher product of surface requirements.Rectangular lines mechanical property uniformity, the comprehensive performances such as tensile strength with higher, plasticity and toughness.Rectangular lines width-thickness ratio reaches 10 or more, meets client's height deformation forming requirements.
Description
Technical field
The present invention relates to wire production manufacture field technology, a kind of motor spring ultra-wide thickness rate rectangular lines are referred in particular to
Production and processing technology.
Background technique
Auto industry has become most fast one of the industry of China's economic development.The advanced manufacturing technology of auto industry collection and
For advanced material science in one, the development of material science has pushed the development of auto industry.As automobile industry development basis
One of condition, the development and application of new material are to guarantee the premise of Domestic Automotive Industry tracking and study world's advanced technology.Together
When, also to the R and D of new material, more stringent requirements are proposed for the development of automobile.
Leaf spring while the car is driving, bears high-frequency reciprocating compression movement, plays buffering and damping effect, matter
The quality of amount plays a crucial role vehicle stability, safety.The automobile leaf spring table of regular special manufacturer's production
Face is flat and smooth, specification specification, and lacquer spraying technique is horizontal high.Especially car to the more demanding of leaf spring performance so that
Vehicle has the characteristics such as noise is small, speed is fast, with small vibration, comfort level is high, elasticity is good, stationarity is good；Heavy and superduty loading
Vehicle then needs high-intensitive leaf spring, and development trend is as general as lightweight (high stress), high-reliability.
Automobile is about 560,000 t to the annual requirement of spring flat steel raw material at present, the quality of domestic spring flat steel, kind and
Specification can satisfy user's requirement substantially, and by taking east wind automobile leaf spring Co., Ltd as an example, the spring flat steel of buying is whole
Production domesticization.Demand to spring for automobile band steel in 2010 is 600,000~700,000 t.Pickup truck, medium-heavy automobile and passenger traffic
Automobile uses leaf spring, the use of dimensions is (6~30) X (50~140) mm, kind is spring flat steel, and annual requirement is about
For 560,000 t.Domestic production producer is more, and product quality can satisfy user demand substantially, but in the spring of some particular components
Band steel, answers its quality that can't preferably meet product requirement, and user specifies outside the spring flat steel for needing steel mill, import foreign countries.
Foreign countries are more early to the research of rectangle steel wire, to the age in last century, can produce various specifications rectangle steel wire, and formed
Series.Foreign countries production rectangle steel wire have regular shape, size fluctuation is small, poker is good, steel wire comprehensive performance is excellent and table
The features such as face quality is high.Compared to other countries, China's rectangular lines product is of less types at present, and specification is single, and deposits
It is not high in dimensional accuracy, the problems such as structure property is unstable, high-quality rectangular lines inefficiency of production.To solve the above problems, more
Come more scholars to rectangular lines carry out more in-depth study, moulding process receive significant attention, and rectangular lines also towards
" big flakiness ratio, high-precision " direction is developed, and more products are applied to engineering practice.
Traditional manufacturing process is existed using stent drawing forming rectangle steel wire, but when forming as periphery fillet fills not
Full, mold periphery abrasion unevenly leads to problems such as die life low, is difficult to realize and produces in enormous quantities.
Summary of the invention
In view of this, in view of the deficiencies of the prior art, the present invention aims to provide a kind of motor spring use
The production and processing technology of ultra-wide thickness rate rectangular lines, when can effectively solve existing rectangle steel wire forming periphery fillet be not fully filled,
Mold periphery abrasion unevenly leads to die life low problem.
To achieve the above object, the present invention is using following technical solution:
A kind of production and processing technology of motor spring ultra-wide thickness rate rectangular lines, comprising the following steps:
(1) round wire rod drawing: is drawn into rectangular wire rod；
(2) it anneals: using isothermal recrystalization annealing process, rectangular wire rod is placed in heat-treatment furnace, in heat treated furnace
It is filled with inert gas, then the temperature in furnace is risen to 690-710 DEG C, keeps the temperature 2.5-3h；Then, with the cooling speed of 10-14 DEG C/h
Degree is cooled to 610-630 DEG C, and keeps the temperature 1.5-1.8h, then, with the cooling velocity of 18-22 DEG C/h to room temperature；
(3) cold rolling: cold rolling is carried out using cold-rolling mill square shaped wire rod and forms rectangular wire, is rolled in cold rolling using tension
System, cold-rolling mill frame is closed frame, and upper rack is connected by upper beam, and lower part is connected by changing track for roll, working roll and bearing
Roller pushes to cylinder loaded on framework window lower part, wedge adjusting equipment is loaded on framework window top, and working roll is by upper in framework window
Bottom working roll, bearing block, bearing and oil-air lubricating device composition；Cold-rolled process uses technical cooling and lubrication, and controls pressure
Rate is less than 60%.
As a preferred embodiment, inert gas is methanol in the step (2), and methanol stream amount is 2L/min.
As a preferred embodiment, technical cooling is used with water coolant as main component, lubrication in the step (3)
Technology lubricant is aqua emulsion.
As a preferred embodiment, cold rolling speed is 5m/s in the step (3).
The present invention has obvious advantages and beneficial effects compared with the existing technology, specifically, by above-mentioned technical proposal
Known to:
Through the invention after process, the wire thickness and width dimensions upper deviation is small, accuracy is high.Its edge is flat
Face, corner radius is smaller, high with components equipment compactness.Wire rod shape is excellent, i.e., straightness is preferable, and poker characteristic is good.It is full
Sufficient client's height deforms forming requirements.Rectangular lines surface smoothness is high, and defect is few, is suitable for the higher product of surface requirements.Square
Shape line mechanical property uniformity, the comprehensive performances such as tensile strength with higher, plasticity and toughness.Rectangular lines width-thickness ratio reach 10 with
On, meet client's height deformation forming requirements.Its properties is obviously superior to domestic market it can be seen from the above index
Similar products can preferably be applied to various high-end product processing industries, make it possible that some specialities domesticize, have
Good market prospects can create considerable economic benefit for company.
Detailed description of the invention
Fig. 1 is the main view of finished product in the present invention.
Specific embodiment
Present invention discloses a kind of motor spring production and processing technologies of ultra-wide thickness rate rectangular lines, comprising the following steps:
(1) round wire rod drawing: is drawn into rectangular wire rod.
(2) it anneals: using isothermal recrystalization annealing process, rectangular wire rod is placed in heat-treatment furnace, in heat treated furnace
It is filled with inert gas, then the temperature in furnace is risen to 690-710 DEG C, keeps the temperature 2.5-3h；Then, with the cooling speed of 10-14 DEG C/h
Degree is cooled to 610-630 DEG C, and keeps the temperature 1.5-1.8h, then, with the cooling velocity of 18-22 DEG C/h to room temperature；Inert gas is
Methanol, methanol stream amount are 2L/min.The purpose of annealing is to reduce the hardness of steel, eliminates cold work hardening, improve the property of steel
Can, restore the plastic deformation ability of steel；The residualinternal stress in steel is eliminated, temperature tissue prevents from deforming；The tissue of uniform steel and
Chemical component.Rectangular wire generates different degrees of processing hardening during the rolling process.Processing hardening be more than to a certain degree after, because
It is unsuitable for continuing to roll to be excessively hard crisp.Therefore rectangular lines (are completed under certain cold rolling stagnation pressure through the certain passage of cold rolling
Amount) after, often want softened heat treatment (in recrystallization annealing temperature etc.), make rolled piece restore plasticity, reduction resistance of deformation, many times after
It is continuous roll it is thin.In cold-rolling process, the cold rolling work completed before each soft annealing is known as one " rolling process ".Centainly rolling
Under the conditions of system, steel is harder, finished product is thinner, and required rolling process is the more.
(3) cold rolling: cold rolling is carried out using cold-rolling mill square shaped wire rod and forms rectangular wire, is rolled in cold rolling using tension
System, cold-rolling mill frame is closed frame, and upper rack is connected by upper beam, and lower part is connected by changing track for roll, working roll and bearing
Roller pushes to cylinder loaded on framework window lower part in framework window, and wedge adjusting equipment is loaded on framework window top, and rack is to constitute
The main part of milling train bears the material resistance of deformation transmitted through roll, although rack rolled in huge pulling force, be
Accurate finish rolling rolling is carried out, rack must have low elongation percentage and enough rigidity；Working roll is by upper working rolls and lower working rolls, bearing
Seat, bearing and oil-air lubricating device composition can make roll keep correct position although working roll does not bear roll-force directly,
And the reaction force of rolling power and tension is born, furthermore also subject to the pressure from roll balance gear, and the axis of roll
Also frequent occurrence, therefore the bearing of working roll must quite be taken into account thrust.
Cold-rolled process uses technical cooling and lubrication, practice have shown that, there are about 84%-88% to be changed into when the deformation of cold-strip steel
Thermal energy.Roll surface temperature is excessively high to cause working roll quenching layer hardness decline, influence the surface quality and roll campaign of strip.Roller temperature
Raising and being unevenly distributed for roller temperature can destroy normal roller row, directly affect the plate shape and dimensional accuracy of strip.Meanwhile roller
Temperature is excessively high also to make Rolling Lubricant Used for Cold fail (rupture of oil film), prevent cold rolling from going on smoothly.In addition, technological lubrication is to drop
The heating of low roll also functions to good effect；It can also play the role of preventing metal roll banding using technological lubrication.In order to protect
The normal production for demonstrate,proving cold rolling should take the effective cooling measure with adjusting with temperature to roll and strip.
Reduction ratio is controlled less than 60%；For reduction ratio for ultra-wide thickness rate rectangular lines, the control of reduction ratio is most important.
Steel wire may respectively be extension area along the deformed area of rolling direction and spread area.The metal that is depressed of height, at the same towards spreading and
The flowing of length side, and development length and spread, then depending on law of minimum resistance and Volume conservation law.When single pass is depressed
When rate is little, with the increase of deformation, on the one hand, the metal volume of thickness direction pressure increases, the volume longitudinally, laterally moved
It necessarily increases;On the other hand, the increase of asynchronous region length is so that the resistance of longitudinal flow will increase, and edge is Free Transform,
The trend of metal transverse movement increases, and the variation spreaded is obvious.When single pass reduction ratio is larger, the contact surface of roll and steel wire
Product significantly increases, and deformed area shape changes, and extends along width and rolling direction, and the frictional resistance of all directions is also increasing
Add, with the increase spreaded, lateral resistance is dramatically increased, and the metal of deformation is mainly flowed to the extending direction of rolling, therefore when width
When exhibition reaches certain value, it is smaller to spread variation.Through practicing, flat rolling wire rod becomes when reduction ratio is less than 60% through single pass
The wire rod of shape spreads linear with reduction ratio.
Technical cooling is used with water coolant as main component, and the technology lubricant of lubrication is aqua emulsion, cold
Rolling speed is 5m/s.
With multiple embodiments, invention is further described in detail below:
Embodiment 1:
(1) round wire rod drawing: is drawn into rectangular wire rod.
(2) it anneals: using isothermal recrystalization annealing process, rectangular wire rod is placed in heat-treatment furnace, in heat treated furnace
It is filled with inert gas, then the temperature in furnace is risen to 690 DEG C, keeps the temperature 3h；Then, 620 are cooled to the cooling velocity of 13 DEG C/h
DEG C, and 1.6h is kept the temperature, then, with the cooling velocity of 19 DEG C/h to room temperature；Inert gas is methanol, and methanol stream amount is 2L/
min。
(3) cold rolling: cold rolling is carried out using cold-rolling mill square shaped wire rod and forms rectangular wire, is rolled in cold rolling using tension
System, cold-rolling mill frame is closed frame, and upper rack is connected by upper beam, and lower part is connected by changing track for roll, working roll and bearing
Roller pushes to cylinder loaded on framework window lower part, wedge adjusting equipment is loaded on framework window top, and working roll is by upper in framework window
Bottom working roll, bearing block, bearing and oil-air lubricating device composition；Cold-rolled process uses technical cooling and lubrication, and controls pressure
Rate is 59%；Technical cooling is used with water coolant as main component, and the technology lubricant of lubrication is aqua emulsion, cold
Rolling speed is 5m/s.
Embodiment 2:
(1) round wire rod drawing: is drawn into rectangular wire rod.
(2) it anneals: using isothermal recrystalization annealing process, rectangular wire rod is placed in heat-treatment furnace, in heat treated furnace
It is filled with inert gas, then the temperature in furnace is risen to 700 DEG C, keeps the temperature 2.5h；Then, it is cooled to the cooling velocity of 10 DEG C/h
610 DEG C, and 1.5h is kept the temperature, then, with the cooling velocity of 18 DEG C/h to room temperature；Inert gas is methanol, and methanol stream amount is 2L/
min。
(3) cold rolling: cold rolling is carried out using cold-rolling mill square shaped wire rod and forms rectangular wire, is rolled in cold rolling using tension
System, cold-rolling mill frame is closed frame, and upper rack is connected by upper beam, and lower part is connected by changing track for roll, working roll and bearing
Roller pushes to cylinder loaded on framework window lower part, wedge adjusting equipment is loaded on framework window top, and working roll is by upper in framework window
Bottom working roll, bearing block, bearing and oil-air lubricating device composition；Cold-rolled process uses technical cooling and lubrication, and controls pressure
Rate is 55%；Technical cooling is used with water coolant as main component, and the technology lubricant of lubrication is aqua emulsion, cold
Rolling speed is 5m/s.
Embodiment 3:
(1) round wire rod drawing: is drawn into rectangular wire rod.
(2) it anneals: using isothermal recrystalization annealing process, rectangular wire rod is placed in heat-treatment furnace, in heat treated furnace
It is filled with inert gas, then the temperature in furnace is risen to 710 DEG C, keeps the temperature 2.8h；Then, it is cooled to the cooling velocity of 14 DEG C/h
630 DEG C, and 1.8h is kept the temperature, then, with the cooling velocity of 22 DEG C/h to room temperature；Inert gas is methanol, and methanol stream amount is 2L/
min。
(3) cold rolling: cold rolling is carried out using cold-rolling mill square shaped wire rod and forms rectangular wire, is rolled in cold rolling using tension
System, cold-rolling mill frame is closed frame, and upper rack is connected by upper beam, and lower part is connected by changing track for roll, working roll and bearing
Roller pushes to cylinder loaded on framework window lower part, wedge adjusting equipment is loaded on framework window top, and working roll is by upper in framework window
Bottom working roll, bearing block, bearing and oil-air lubricating device composition；Cold-rolled process uses technical cooling and lubrication, and controls pressure
Rate is 57%；Technical cooling is used with water coolant as main component, and the technology lubricant of lubrication is aqua emulsion, cold
Rolling speed is 5m/s.
The product obtained after above-mentioned each embodiment processing is subjected to surface hardness, tolerance, corner radius and generous
Than examining, surface hardness, tolerance, the method for inspection of corner radius and width-thickness ratio are existing mature technology, at this to surface hardness,
The method of inspection of tolerance, corner radius and width-thickness ratio does not describe in detail, and the structure of finished product is as shown in Figure 1, examine obtained number
According to as shown in the table:
Through the invention after process, the wire thickness and width dimensions upper deviation is small, accuracy is high.Its edge is flat
Face, corner radius is smaller, high with components equipment compactness.Wire rod shape is excellent, i.e., straightness is preferable, and poker characteristic is good.It is full
Sufficient client's height deforms forming requirements.Rectangular lines surface smoothness is high, and defect is few, is suitable for the higher product of surface requirements.Square
Shape line mechanical property uniformity, the comprehensive performances such as tensile strength with higher, plasticity and toughness.Rectangular lines width-thickness ratio reach 10 with
On, meet client's height deformation forming requirements.Its properties is obviously superior to domestic market it can be seen from the above index
Similar products can preferably be applied to various high-end product processing industries, make it possible that some specialities domesticize, have
Good market prospects can create considerable economic benefit for company.
The above described is only a preferred embodiment of the present invention, be not intended to limit the scope of the present invention,
Therefore any subtle modifications, equivalent variations and modifications to the above embodiments according to the technical essence of the invention, still
Belong in the range of technical solution of the present invention.
Claims (4)
1. a kind of motor spring production and processing technology of ultra-wide thickness rate rectangular lines, it is characterised in that: the following steps are included:
(1) round wire rod drawing: is drawn into rectangular wire rod；
(2) it anneals: using isothermal recrystalization annealing process, rectangular wire rod is placed in heat-treatment furnace, is filled in heat treated furnace
Inert gas, then the temperature in furnace is risen to 700 DEG C, keep the temperature 2.5h；Then, 610 are cooled to the cooling velocity of 10 DEG C/h
DEG C, and 1.5h is kept the temperature, then, with the cooling velocity of 18 DEG C/h to room temperature；
(3) cold rolling: carrying out cold rolling using cold-rolling mill square shaped wire rod and form rectangular wire, and tension-rolling is used in cold rolling, cold
Rolling-mill housing is closed frame, and upper rack is connected by upper beam, and lower part is connected by changing track for roll, and working roll and backing roll are in machine
In frame window, cylinder is pushed to loaded on framework window lower part, wedge adjusting equipment is loaded on framework window top, and working roll by working up and down
Roller, bearing block, bearing and oil-air lubricating device composition；Cold-rolled process uses technical cooling and lubrication, and controls reduction ratio and be
55%。
2. the motor spring according to claim 1 production and processing technology of ultra-wide thickness rate rectangular lines, it is characterised in that: institute
Stating inert gas in step (2) is methanol, and methanol stream amount is 2L/min.
3. the motor spring according to claim 1 production and processing technology of ultra-wide thickness rate rectangular lines, it is characterised in that: institute
It states technical cooling in step (3) to use with water coolant as main component, the technology lubricant of lubrication is aqua emulsion.
4. the motor spring according to claim 1 production and processing technology of ultra-wide thickness rate rectangular lines, it is characterised in that: institute
Stating cold rolling speed in step (3) is 5m/s.
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| CN108220800A (en) * | 2017-12-28 | 2018-06-29 | 东莞科力线材技术有限公司 | A kind of preparation method of the bright as silver arc side flat wire in egg-whisk surface |
| CN108188195B (en) * | 2018-03-02 | 2019-05-07 | 江苏浩峰汽车附件有限公司 | A kind of forming method of high intensity banding substrate |
| CN110993184B (en) * | 2019-12-06 | 2021-08-27 | 中国科学院电工研究所 | Iron-based superconducting strip and preparation method thereof |
| CN112427484B (en) * | 2020-11-11 | 2022-07-26 | 南京工程学院 | Method for manufacturing stainless spring steel wire through recrystallization annealing regulation and control |
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| JPS57152314A (en) * | 1981-03-18 | 1982-09-20 | Furukawa Electric Co Ltd:The | Manufacture of flat square wire |
| CN100581716C (en) * | 2006-06-12 | 2010-01-20 | 株式会社神户制钢所 | Flat wire manufacturing method of manufacturing flat wire for ring gear |
| CN103302096B (en) * | 2013-06-25 | 2015-03-18 | 无锡天辰冷拉型钢有限公司 | Cold rolling-drawing method for producing small-sized square flat steel with low-carbon and high-sulfur free-cutting steel |
| CN103357695A (en) * | 2013-07-31 | 2013-10-23 | 中钢集团郑州奥威钢线科技有限公司 | Processing method for flat wire used for tensioning wheel of engine |
| CN104475446A (en) * | 2014-11-11 | 2015-04-01 | 东莞市科力钢铁线材有限公司 | Production technique for high-toughness flat wire |
| CN104588434B (en) * | 2014-12-25 | 2016-09-14 | 东莞市科力钢铁线材有限公司 | Thrust dual powerplant and the method applying this device production shaped wire |
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